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Paper deacidification agent and using method thereof

A deacidification agent and paper technology, which is applied in the post-processing of waste paper, etc., can solve the problems of uneven deacidification, fading of handwriting, accelerated photooxidation of cellulose in paper, etc., and is conducive to long-term preservation, simple and good use method. Effect of deacidification effect

Active Publication Date: 2015-07-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Among the non-aqueous deacidifying agents, barium hydroxide-methanol solution will spread the handwriting after deacidifying, and the deacidifying agent is poisonous; methoxymethyl magnesium carbonate has uneven deacidification, handwriting fades, white spots, and wrinkles Problems such as discoloration and adhesive oozing, so there are certain limitations; diethyl zinc vapor phase deacidification method is the best deacidification method today, but the zinc oxide produced after deacidification can accelerate the photooxidation of paper cellulose Moreover, diethyl zinc is a substance that is flammable spontaneously in the air and has the danger of explosion. Once it is handled improperly, it will cause incalculable losses
Magnesium alkoxides can damage books to varying degrees, and the treated books may absorb moisture faster, with obvious discoloration, fading and odor, and yellow and translucent stains appear at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The paper deacidifying agent of the present invention is formed by dissolving tris(hydroxymethyl)aminomethane in ethanol aqueous solution and uniformly mixing, and the preparation method is as follows:

[0023] Reagent Tris(hydroxymethyl)aminomethane mass (g) Volume fraction of ethanol water solution (%) Volume of ethanol water solution (ml) No. 1 deacidification agent 2 98 500 No. 2 deacidification agent 3 98 500 No. 3 deacidification agent 4 98 500 No. 4 deacidification agent 3 50 500 No. 5 deacidification agent 3 70 500

Embodiment 2

[0025] Take 132g of Liberty Daily in 1986, put it into a container of appropriate size, and soak it in 130g of No. 1 paper deacidifier at 25°C for 40 minutes to neutralize the acidic substances in the paper. The paper properties before and after deacidification are as follows:

[0026] pH Tension resistance N Elongation% Tear degree mN Folding Endurance Before deacidification 4.4 22.53 0.78 28 11 After deacidification 7.00 23.51 1.21 35 24 after aging 6.50 21,22 1.08 30 18

Embodiment 3

[0028] Take 200g of Liberty Daily in 1986, put it into a container of appropriate size, soak it in 500g of No. 4 paper deacidifier at 25°C for 20 minutes, and neutralize the acidic substances in the paper. Take the deacidification agents listed in the table below, dissolve them in 50% ethanol aqueous solution to make a saturated solution, and use the same conditions to treat the same amount of paper as a reference. From the comparison of the deacidification results, it can be seen that the deacidification effect using tris (hydroxymethyl) aminomethane (Tris) is obviously better than other types of deacidification agents listed in the table below. After aging at 105℃ for 72 small tests, the strength remains good.

[0029] The comparison of performance parameters of paper before and after deacidification and after aging is shown in the table below:

[0030] Tris K 2 B 4 o 7 Ca B 4 O 7 CaCO 3 Ca(C 2 h 5 COO) 2 Ca(OH) 2 MgCO 3 Mg(HCO 3 ...

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Abstract

The invention discloses a paper deacidification agent and a using method thereof. The paper deacidification agent is prepared by dissolving 4-8g of tris (hydroxymethyl) aminomethane in each liter of ethanol water solution with the volume fraction of 50-98 percent. The using method comprises the following steps: directly contacting paper and the paper deacidification agent for 0.3-2 hours for deacidification at the temperature of 25 to 60 DEG C, wherein the amount of the paper deacidification agent is 1-10 times that of the mass of the paper; and drying the deacidified paper, and finishing the deacidification process. The provided paper deacidification agent is mild in nature, the paper structure is prevented from being damaged, the chroma of the paper does not have obvious change after deacidification treatment, and the paper is preserved for a long time.

Description

technical field [0001] The invention specifically relates to a paper deacidification agent, and also relates to a method for using the deacidification agent, belonging to the technical field of paper deacidification. Background technique [0002] "Ancient Books" is the abbreviation of ancient Chinese books, the main carrier and representation of human material civilization and culture, and a precious historical and cultural heritage left to us by the splendid civilization history of the Chinese nation for 5,000 years. According to statistics, there are currently 30 million volumes of ancient books and documents collected by libraries in our country. However, due to the long history, some precious and rare books handed down from generation to generation are riddled with holes and incomplete, and about 5% of the ancient books and documents have reached the degree of serious damage. Therefore, how to protect these precious ancient books and documents is in front of us. An ur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/18
Inventor 江广彬陈铭陈婉纯冯志宏张碧思方岩雄周蓓蕾
Owner GUANGDONG UNIV OF TECH
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